JPS62144825A - Trimming die device - Google Patents

Abstract

PURPOSE:To prevent unreasonable shearing force on a trimming part and to avoid generating chips by projecting a trimming cutter of an upper die downward to specify shapes of the upper and lower cutting edges and by providing a cutter containing part on the dies to bend the scrup part downward. CONSTITUTION:A steel sheet 1 is loaded on the lower die 2 and as descending the upper die 3, the steel sheet 1 is pushed on the lower die 2 by a pud 6 to position and to fix. Then, the trimming of the steel sheet 1 is begun by the projected cutter 5a and the lower trimming cutter 4. The part 1a to be the scrup is pressed downward by the cutter part 5a to bend downward along with the sloped part 10a of the lower cutting edge 10. In this case, because the bending of the part 1a is performed after trimming by the cutter 5a and the lower cutter 4, no unreasonable shearing force is applied on the trimming part to prevent generation of a broken part. Therefore, no chip is generated.

Description

Detailed Description of the Invention A1 Objectives of the Invention fl, l Graduation Field of Application The present invention provides upper and lower molds each having trimming blades for cooperatively trimming a thin metal sheet, and The present invention relates to a trimming mold device comprising upper and lower scrap cutters attached to the upper and lower molds and having cutting blades forming an angle with the trimming blades to cooperatively cut the scrap to be cut.

(2) Conventional technology Conventionally, in such trimming mold devices, the upper cutting blade of the upper scrap cutter is connected to the trimming blade of the upper mold at almost right angles and protrudes downward, and the lower scrap cutter is connected to the trimming blade of the lower mold. It is located below the trimming blade.

(3) Problems to be Solved by the Invention - To explain the operation of the above-mentioned conventional device in FIG. The portion 1a of the thin steel plate 1 that is to become a scrap is pressed by the upper scrap cutter as shown in FIG. 4 (al), and the portion corresponding to the upper scrap cutter is trimmed. A break 15 occurs in the thin steel plate 15.1 at a portion corresponding to
It becomes even larger as shown in . After that, in Figure 4, f
As shown in c), the broken portion 15 is trimmed by the trimming blade of the upper mold and the trimming blade of the lower mold 2'.

According to such conventional trimming, burrs are generated at the fractured portion 15, and by trimming the burrs, the chips 1 are removed.
6 occurs. The chips 16 are transferred to the upper mold and the lower mold 2.
Not only will it remain on the surface of the product, but it will also scatter on the product surface, causing surface scratches in subsequent processes such as piercing.

In addition, the upper mold and lower mold 2' are cleaned after a certain number of operations, but at that time, chips 16 may enter the sliding parts or adhere to the upper mold and lower mold 2'. The removal work was troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a trimming mold device that can cut scrap while avoiding generation of chips.

B1 Structure of the Invention (1) Means for Solving the Problems According to the present invention, the trimming blade of the upper mold trims the portions corresponding to both scrap counters before the other portions, and trims both scraps. The upper scrap cutter is provided with a part corresponding to the cutter that protrudes downward, and the upper scrap cutter has an inclined part that slopes upward as it moves away from the upper trimming blade within a plane that forms an angle with both trimming blades, and The lower scrap cutter is provided with an upper cutting blade having a horizontal portion that extends horizontally, the lower scrap cutter is provided with a lower cutting blade that has a horizontal portion and an inclined portion corresponding to the upper scrap cutter, and the upper mold is provided with a lower scrap cutter. A housing recess is provided that can accommodate the upper scrap cutter, and a gap is provided between the lower scrap cutter and the lower mold that can accommodate the upper scrap cutter.

(2) Function Trimming is first started from the portion corresponding to the scrap cutter, and the portion to be scrapped is bent downward, and after trimming is completed, it is cut while remaining in the bent state.

(3) Embodiment Below, an embodiment of the present invention will be explained with reference to the drawings. First, in FIG. , and an upper mold 3 that is driven up and down by a drive means (not shown). A lower trimming blade 4 is provided on the outer peripheral edge of the upper end of the lower mold 2 along a line in which the thin steel plate 1 is to be trimmed.

On the other hand, an upper trimming blade 5 corresponding to the lower trimming blade 4 is provided on the inner peripheral edge of the lower end of the upper mold 3.

A pad 6 for pressing the thin plate W4 plate 1 upward onto the lower mold 2 and positioning and fixing it is supported in the upper mold 3 so as to be relatively movable up and down. It is urged downward by a spring (not shown) interposed between. Therefore, when the upper mold 3 is not lowered, the pad 6 protrudes downward from the upper mold 3.

In order to cut the portion 1a of the thin steel plate 1 that is to be scrapped, an upper scrap cutter 7 is attached to the upper die 3, and a lower scrap cutter 8 is attached to the lower die 2. Furthermore, the upper trimming blade 5 is provided with a protruding blade part 5a that protrudes downward at a portion corresponding to both the scrap cutters 7.8.

The upper scrubber knob 7 is provided with an upper cutting blade 9 orthogonal to the upper trimming blade 5, and the lower scrubber knob 8 is provided with a lower cutting blade 1° orthogonal to the lower trimming blade 4.

The upper cutting blade 9 has a sloped part 9a that slopes upward as it moves away from the protruding blade part 5a within a plane perpendicular to the protruding blade part 5a of the upper trimming blade 5, and extends horizontally from the outer end of the sloped part 9a. It has a horizontal part 9b. The lower cutting edge 10 is the upper cutting edge 9
It has an inclined portion lOa and a horizontal portion 10b corresponding to the slanted portion lOa and the horizontal portion 10b. Moreover, the horizontal portion lOb is at the same level as the lower trimming blade 4.

The upper mold 3 is provided with an accommodation recess 11 for accommodating the lower scrap cutter 8 when lowered to the lower limit. Further, the lower scrap cutter 8 is disposed on the side of the lower mold 2 so as to form a gap 12 between the lower scrap cutter 8 and the lower mold 2 in which the upper scrap cutter 7 can be accommodated.

Next, to explain the operation of this embodiment, the thin steel plate 1
For trimming, after placing the thin steel plate 1 on the lower mold 2, the upper mold 3 is lowered. At this time, pad 6
first comes into contact with the thin steel plate I, and as the upper die 3 descends, the spring force is strengthened, and the pad 6 presses the thin steel plate 1 against the lower die 2, and the thin steel plate I is positioned and fixed.

Next, trimming of the thin steel plate l by the protruding blade part 5a and the lower trimming blade 4 is started as shown in FIG. It is bent downward along the inclined portion 10a.

At this time, the bending of the portion 1a to be scrapped is as follows:
Since this is performed after trimming by the protruding blade portion 5a and the lower trimming blade 4, application of unreasonable shearing force to the trimming portion is avoided and no breakage portion occurs.

When the upper mold 3 further descends, trimming is performed by the upper trimming blade 5 and the lower trimming blade 4, and the portion 1a to be scrapped is cut off. Moreover, after excision,
The part 1a to be scrapped is the upper and lower cutting edges 9.10
As shown in FIG. 3, the sheet is further bent and cut in this bent state.

C1 Effects of the Invention As described above, according to the present invention, the trimming blade of the upper mold is a portion corresponding to both scrap cutters in order to trim the portion corresponding to both scrap cutters prior to other portions. The upper scrap cutter is provided to protrude downward, and the upper scrap cutter has a sloped part that slopes upward as it moves away from the upper trimming blade within a plane that forms an angle with both trimming blades, and a horizontal part that extends horizontally from the outer end of the sloped part. The lower scrap cutter is provided with a lower cutting blade having an inclined part and a horizontal part corresponding to the upper scrap cutter,
The upper mold is provided with an accommodation recess that can accommodate the lower scrap cutter, and a gap that can accommodate the upper scrap cutter is provided between the lower scrap cutter and the lower mold.
After trimming, the portion to be scrapped is bent downward and cut in the folded state, so that the scrap can be cut without producing a broken portion or chips.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
Fig. 1 is a longitudinal cross-sectional view of the main part, Fig. 2 and Fig. 3 are longitudinal cross-sectional views corresponding to Fig. 1 for sequentially showing operating states, and Fig. 4 is a perspective view sequentially showing conventional operating states. It is. ■...Thin steel plate as a metal thin plate, 2...Lower mold,
3... Upper mold, 4, 5... Trimming blade, 7...
Upper scrap cutter, 8...Lower scrap cutter, 9
...Upper cutting edge, 10...Lower cutting edge, 11...Accommodating recess, 12...Gap Patent applicant Honda Motor Co., Ltd. Figure 3 Figure 1 Figure 2

Claims (1)

[Claims] Upper and lower molds each have trimming blades for cooperatively trimming a thin metal sheet, and a cutting blade forming an angle with the two trimming blades for cooperatively cutting scrap to be removed in response to trimming. In a trimming mold device comprising upper and lower scrap cutters attached to the upper and lower molds, the trimming blade of the upper mold trims the portion corresponding to both scrap cutters before other portions. The upper scrap cutter has a sloped part that slopes upward as it moves away from the upper trimming blade within a plane forming an angle with both trimming blades, and a sloped part of the sloped part. The lower scrap cutter is provided with an upper cutting blade having a horizontal portion extending horizontally from the outer end, the lower scrap cutter is provided with a lower cutting blade having a horizontal portion and an inclined portion corresponding to the upper scrap cutter, and the upper mold is provided with a lower cutting blade having a horizontal portion extending horizontally from the outer end. 1. A trimming mold device characterized in that an accommodation recess capable of accommodating a scrap cutter is provided, and a gap capable of accommodating an upper scrap cutter is provided between the lower scrap cutter and the lower mold.